<template>
  <div class="person">
    <h1>情况五：监视上述的多个数据</h1>
    <h2>姓名：{{ person.name }}</h2>
    <h2>年龄：{{ person.age }}</h2>
    <h2>汽车：{{ person.car.c1 }}, {{ person.car.c2 }}</h2>
    <button @click="changeName">修改名字</button>
    <button @click="changeAge">修改年龄</button>
    <button @click="changeC1">修改第一台车</button>
    <button @click="changeC2">修改第二台车</button>
    <button @click="changeCar">修改整个车</button>
  </div>

</template>

<script setup lang="ts" name="Person">
import {reactive, watch} from 'vue'

//数据
let person = reactive({
  name: 'zhangsan',
  age: 18,
  car: {
    c1: '奔驰',
    c2: '宝马'
  }
})


function changeName() {
  person.name += '~'
}

function changeAge() {
  person.age += 1
}

function changeC1() {
  person.car.c1 = '雅迪'
}

function changeC2() {
  person.car.c2 = '立马'
}

function changeCar() {
  person.car = {c1: 'BYD', c2: 'GEELY'}
}

// 监视，情况五：监视上述的多个数据
// () => person.car ==> person.car (// 监视，情况四： 监视响应式对象中的某个属性，且该属性是对象类型的，要写成函数式（推荐），也能写出对象)
watch([() => person.name, () => person.age, () => person.car], (newValue, oldValue) => {
  console.log('person.car变化了', newValue, oldValue)
}, {deep: true})
</script>
<style scoped>

.person {
  background-color: skyblue;
  box-shadow: 0 0 10px;
  border-radius: 10px;
  padding: 20px;
}

button {
  margin: 0 5px;
}

li {
  font-size: 20px;
}
</style>